Wax stripper and tension device



April 1939- J G. w. w o D 2,155,918

WAX STRIPPER AND TENSION DEVICE Filed Dec. 2, 1957 gro er W Wa d.

g @wz, M2045,

Patented Apr. 25 1939 UNITED STATES PATENT OFFICE WAX STRIPPER AND TENSION DEVICE Application December 2, 1937, Serial No. 177,833

8 Claims.

This invention relates generally to shoemachinery and especially to an attachment for shoe repair machines capable of using waxed thread for stitching the shoes.

5 'An object of the invention resides in the provision of a container or pot for liquid wax, adapted to be attached to the machine, in combination with means for applying a suitable tension to the thread entering and leaving the container.

Another object of the invention consists in the provision of means for readily varying the tension on the thread as it leaves the wax container, and for stripping the thread of surplus wax.

A further object of the invention resides in providing a wax stripper which is designed for easy adjustment to vary the pressure on the thread, and which is capable of eliminating kinks in the thread and yet will present no obstruction to the passage of such knots as may be necessarily formed in the thread.

Other objects and advantages of the invention will be apparent from the following description when taken in connection with the accompanying drawing, in which,

25 Figure 1 is a vertical section through the wax pot, and showing the attachment in elevation.

Figure 2 is an end view of the stripper and lid, removed from the pot.

Figure 3 is an enlarged horizontal sectional view through the stripper taken on line 33 of Figure l and looking in the direction of the arrows.

Figure 4 is a vertical sectional view through the stripper.

Figure 5 is a sectional view on line 55 of Figure 1, viewing the initial tensioning device in elevation; and,

Figure 6 is a perspective view of a thimble through which the treated thread passes to the needle of the stitching mechanism (not shown).

Referring to the drawing in greater detail the numeral l indicates a wax pot constructed of any suitable material and provided with means (not shown) for supporting it in proper relation to any conventional type of shoe stitching machine. The pot I may be closed by a lid 2 having one end engaged in a groove 3 at one side of the receptacle and its other edge secured in position by a screw 4 or the like.

Mounted on the lid 2 as by means of bracket 5, is a thread guide pulley and tensioning device. This device, which is of more or less conventional construction, includes separate discs 6 loosely mounted on a bolt 1 which is in turn loosely 55 mounted in the bracket 5. A coil spring 8 surrounds the bolt I and has its ends in engagement with the bracket 5 and an adjusting nut 9 respectively. The tensioning wheel 6 is disposed between a head ll! of the bolt I and the bracket 5, and it will be apparent that by adjusting the nut 9 the compression on the spring 8 may be varied, and likewise the tension applied to the thread.

The thread is guided to the roller 6 from any suitable source of supply by an eye ll secured to the lid 2 at a point adjacent the roller.

Also mounted on the lid 2, in a threaded opening formed therein, is a tubular member I2; 2. lock-nut l3 being provided for securing the member in position after it is threaded into the opening. Within the tubular member 12 is a thimble l4 provided with a flange I5 at its upper edge by which it is supported in member l2. One side of the thimble is beveled ofi as indicated by numeral I6 for a purpose which will later appear.

The tubular member I2 is formed with a longitudinal slot I! in which is mounted a combined tensioning device and wax stripper. The upper portion of this device consists of a plate I8 formed with a cut-out portion to provide for the reception of a portion of an adjusting nut I9 between the projections 20 and 2| of the plate. The thimble l4 holds the plate l8 against the nut l9, and the plate is therefore raised or lowered as the nut is raised or lowered by means of its threaded engagement with the upper portion of the tubular member l2. The lower portion of plate I8 is provided with a notch or the like for the reception of the upper end of an L-shaped resilient member 22, although any preferred means may be employed for securing these parts together. The horizontal part 23 of the L-shaped member is preferably bent over as indicated at 24 to provide a'rounded portion adapted to engage the thread and press it against the lower edge of the tubular member as it is drawn up into the latter. The engagement of the thread between the part 24 and the lower portion of the tubular-member provides for stripping off excess wax from the thread and also places a tension on the thread.

In order that the tension on the upwardly moving thread may be varied and also to vary the amount of wax removed from the thread it is necessary that the pressure of the member 24 against the thread be varied. To this end the lower portion of plate I8 is beveled off, as indicated at 25, to provide a cam adapted to cooperate with an edge of the nut l3. It will be apparent therefore that as the plate I8 is raised or lowered through operation of nut IS the lower portion of the plate is flexed inwardly or outwardly with respect to the tubular member. This radial movement of the lower portion of the plate together with its vertical movement combine to vary the compression of the thread between the elements I2 and 24. The bevel l6 on the thimble I4 is provided for the purpose of allowing the" lowei' portion of the p1at"to' bemoved inwardly by its cam 25.

Reverting to the introduction of the thread into the wax pot, it passes through an openin'g 30 in closure 2 to a guide pulley. 31 rotatably mounted on a bracket 32 fixed 'totfie underside of the lid. The bracket 32' is of sufiicierit lengthto extend to a point near the-bottom ofi the pot and the guide pulley is mounted closely-- adjacent its lower end, thereby causing the thread passing around the wheel to be immersed in the liquid wax prior to its passage up through"- the combined stripper and tensioning-devicer The operation of the various parts of the apparatushave been described in connection with the description of the structural detailsand need 7' notbe repeated other than to point-out'that it is only necessary to' rotate the nut l9 in theproper direction in order to effect the movement of the member 22 and consequently the pressure applied to the thread. Moreover the arrangement oi; the member 22 and-tube l2 is-suchasnot only to provide the necessary tension and stripping action but also to allow for automatic lateral movement of' the member 22 thereby serving to allow the passage of any-knots which -'may be formed in the thread. Furthermore the tensioning of thethread as it enters and leaves the pot eliminates any possibility of the forma-" tion of kinkstherein,

In accordance with the patent statutes I-have 4Qg dscribed what I nowbelieve to --be the preferred form of the invention but inasmuch'as'various minor changes may, be made in the details'of construction without departing from: thespirit of the invention it is intended that all such 45gchanges be included withinthe scope of the appended claims.

Havingi fully described the invention," what: I claim is:

s l. Ath'read waxing mechanismfonsewirig ma *chines; including'a wax='pot,-a tensioning device I through which th'e thread pa'ssesinto the'pot', a tubular member through which'the thread passes 1 on leaving the pot, a finger-forpressing thethread against the tubular" member to"strip"the wax and" tension'the thread; anda"camrning'" rrlem'b'er for varyingth'e pressure ofl-thefir'fger on the thread.

2. In a waxing. mechanism for. sewing. ma- 60 chin'es, including-a waxapot a tubular member? through which the thread leaves the pot, a leaf spring for engaging the thread as it passes through the tubular member, and means for varying the pressure of the leaf spring on the thread. 5

3. In a waxing mechanism for sewing machines including a wax pot, a tubular member through which the thread leaves the pot, a combinedflwax stripperand tensioning 'finger asso-\ ciated' witli the tubularmember, -acamming\l0 member to which the finger is attached, and means for adjusting the position of the camming member tovary the pressure of the finger.

4. In a" waxing-"mechanism for sewing machines includi ng awax pot, a tubular member through which the thread leaves the pot, a resilient fingrhaving its lower end in cooperative relation to the lower end of the tubular member, a camming member to which the finger is attached", and means for operating the camming. member.

51111 a waxing mechanism for. sewingma chinesdlicludingi a wax pot, a tubular member. through which the thread leaves the pot, a-- resilient finger having its lower end in cooperative relation to the lower endof the tubular member, a nut threaded tothe tubular member,. a cam'ming member operatively connectedLwitlL the nut, and a connection between the cammingr. member and finger? Q3 6 In a waxingv mechanism for sewing machines. including? a wax pot,fa=tub'u-lar..memberl associated therewith and provided with :a. longi tudinal slot, a nut threaded on the tubular member, a thimblein thetubulanmembena cam- 3.

ming device mounted 1m the sl ot of the tubularmember anddisposed b etweemthe thimb le-and nut, a connection between the :camming device and' nut, and a spring finger connected'to the camming device.

7. In awaxingmechanism fer: sewing... machines, including a wax pot, a tubular member-u. associated therewith I and provided-with a -longi-- tudinal slot, a nut threaded on the tubular-mam ber,.athimble in the tubular: member, a camming dvice mounted in the slot of the tubular... member and disposed between the thimble-and nut, a portion of said th imbleb eingbeveled oftto permit radial -movement of the cammingwdevice; a connection between the camming-= device andnut, and aspring fingerconnected: to the camming device.

8's In .a-waxing -mechanism for sewing; .machines including a wax pot, a tubular member: through which .thethread leavesthelpot, and-L- shaped member of resilient materiaLassociatedwith the pot and having one arm inaengagementavith the thread as:it passes into the tubular member.

GROVER W. wooDII 

